Key-seating tool.



G.-S. COATS. KEY SEATING TOOL. APPLICATION man APR. n, 1915.

Patented Sept. 4, 1917.

j a A 5% I N VENTOR 366622 5,

AmnxnYS enonsn s. ooA'rs, or VISALIA, CALIFORNIA.

m mmm TOOL.

Specificationof Letters Patent.

Patented Sept. at, 15117..

Application filed Apri117, 1915. SerialNo. 22,099.

To all whom it may concern: 3"

Be itknown that I, GEORGE S. COATS, a citizen of the United States,residing at Visalia, in the county of Tulare and State of California,have invented a new andus'c ful Key-Seating Tool, of which the followingis a specification. i j The invention contemplates, an ii'nproved toolfor cutting a key seat in wheels, gears, bushings and the like, and itis particularly adapted to be used in conjunction with'the chuck'an'dcarriage of a machine such as a lathe, and may be applied \to suchmachine to cut the key seat in the work without removing the workfromthe machine.

The invention further comprises improved means for cutting either astraight or an inclined key seat in the work.

The invention is illustrated in the accompanying drawing in which-Figure 1 is a side elevation of the-too1. Fig. 2 is a bottom plan viewof thetool. Fig. 3 is a view illustrating the operat on of the toolapplied to a lathe to cut an mclined key seat in a pulley, the pulleyand the tool guide bushing being shown 111 section.

Fig. .4: is an end view of'the guide bush ing for thetool 'which isused-to cause the tool to cut an inclined key seat inthe work. Fig." 5is a side view of said bushing. Fig. 6 is a side view of said bushmg andillustrating how the work is attachedthereto, the work being shown inSQOtlOIL Fig. 7- is a cross section on line 77' of Fig.1. Referring nowmore particularly to' the characters of reference on the drawings, thenumeral 1 designates a holder or support for the tool, which is shapedin any sultable manner'to fit into the tool post or tail stock of thelathe or other suitable supporting carriage. At its forward end thismember 1 is provided with a transverse oblong slot 2 which is ofimportance for a purpose as will presently appear. The tool properconsists primarily of a frame constructed in any suitable manner, butpreferablymade up of-two sides3 and 1' suitably connected together ateach end by countersunk screws or bolts 5. The members 3% are cutout orrecessed for a portionoftheir length to form an intermediate slot 6.1Thesaid frame 3-4= is suitably connected with the holder 1 by means ofaslot7'which'receives the end of the holder 1, there being a boltSprojecting through the member 8--1 and the slot 2 by means of which thesaid frame 3 4 may be suitably tightened on the holder 1. i

"The numeral. 9 designates the driving shaft which is suitably journaledin the frame and projects across the slot 6 where it isprovided with akeyed driving gear 10. The numeral 11 designates a train of stub shaftsournaled in the-member 3-4: and each projecting across the slot 6, therebeing a gear 12 mounted on each shaft 11, thesaidgears 10 and 12inter-meshing in successive order to form a train of gears.

"The numeral 13 designates the cutter shaft located near the otherterminal of the slot 6 which projects into eccentric bushings 14disposed in the side walls of the slot 6, such bushings being heldagainst undesired rotation by means of set screws 15. By means of theseeccentric bushings, the shaft 13 can be positioned to compensate for thewear on the cutter gear. This cutter gear 16 is mounted on the shaft 13and the teeth are profiled on the driven side, the same as aregears,and'engage the last of the gears 12 in order to impart rotation tothe gear 16. The other'profile of'the teeth of the gear 16 is sharpenedin a manner similar to a milling cutter. The said teeth on the gear 16project beyond one side of the frame 3 1, while the gears 10 and 12 arepreferably contained within the slot 6 so as to be out of the way of anypossible interference of the work. i The structure just described isthatwhich is preferably constructed for use in connection with the lathe orsimilar supporting carriage and when used, the operation is as follows,namely:

The holder 1 is suitably secured in the tool post or tail stock of thelathe or in any other suitable carriage. Power is then applied to theshaft 9 in any suitable manner either by flexible shaft connectionsconnected up with the running gear of the lathe or other carriage,oi-having an independent drivingmeans. This power is transmitted throughthe shaft'Qto the gear 10 and thence through the trainof gears 12 to thecutter gear 16. Hence, without removing the work in which the key seatis to be cut, my improvedtool can be advancedinto thework and theoperation of the cutter gear 16 suitably guided will cut the desired keyseat.

For cutting perfectly,horizontalikey seats, the member 3 4 will belongitudinally alined with the member 1. Vhen tapered key seats are tobe out however, I providean auxiliary bushing 17, the inner wall ofwhich is disposed obliquely with respect to its longitudinal axis, suchbushing 17 being provided with aslot 18 along one side thereof: When atapered slot is to be cutinto,thework;asin a hub 19 on a pulley 20, theauxiliary bushhs v s nw edunthe hub, Theo en circumference; of, thesaid, bushing 1 isco n; centric withthe inner circum-terenceoi?- the;hub 13, which will cause the innencircnm ference of the said bushing 17to be oblique or eccentric with respect to the inneraoircun ference ofthe said hub 19. When the hushing lg is in placewithin the. hub 19, theslot 18 will be positioned adjacent that point at, whichlit, is, desiredto cut the key,

tZl int h id 1 th, .19. T h ng will he held against,displacement fromthe; hub 19 by means ofttwoset screws 17 dis; posed one, at eaclrendofsaidbushing out; side, of-the hub 19' so as to engage; thehub to prevent said bushing from slippingout of the hub.When,thebushingissuitably positioned thehub as described, the, cuttertem 3: h, ip iect ngr to h u h: gt 0 r hs h it er; 6 l1tQfi i 1Ql 'l6Iwith the slot 18 so that when theisaid frame, adv nsed thr ugh, hebushing is cutter will cut theheyi seat 21. v

t. ?y mte ha e aid. fra1ne,3tbe guided in alin'ejment with the sse t e-iner P riphe yo z hs u hin 7 in order that as ,the cutter 16, isvadvanced through the bushing it willput theitapered keys a' 21- his nmmta s at mpli ecl bys e nihg h o t 8, nd m v g t through the slot 2. 2mshown in Fig. 3 until theicutteris readyifoig movement through the hushs 7 W1? x al ali m t .w h. e result that the cutter 16- will-cause -thekey seat i 2l to, be tapered. As the toolais moved forward andis guideddownwardly at an anglebythe innersurface ot the bushing, the forward endo f the llOQlHlQVGS clownwardly in a .vertieal direction, I, whichlatter movement isipe rmitted by the slot2 through which the boltSentends From a the, foregoing description it readily: be seen, that Ihave-provided a simpleand etlicient key seating toolqfor inten mil, Wo bea s ti ht h keyv eat may. be cut ,in ,the work without removing thenfrom the carriage in whichthey are placed, my improved, tool embodying anovel cutter structureland; a novell and improved method. of driving thesamethereof by con,- nection with the driving powerof the earriage inwhich the tOOLmaybepla ed r by siei e d tipow ri flimsydt qst desirable,i

ll urther e e ha I -have p 10:

du ced such a deviceias substantially fulfils the objects of theinvention as set forth herein.

l/Vhilethis specification sets forth in de' tail the present andpreferred construction of-"the device, still in practice, suchdeviations from such detail may be resorted to as do-not form adeparture from thespirit of the invention i fi defined by the appendedclaims;

Having thus described my, invention, what I claim as new. and useful anddesire-tosecu eby Let rsP tenti r r 1, A; tool-for the purpose describedcomprising a support, torengage nent with any: suitable carriage, said,support beingi pro: vided with a transverse slot, i'a-body, memberhinged to such support; such hinge comprising a bolt.projectingthroughthe body memher and, such transverse slot, a rotating cutter; carriedby. the body member; and a train of gears callfiedbythe body,meinberandiar ranged for driving thet;cutter.

2. A tool for the"p urp osepdescribed coniprismgg, a support; forengagement with i any suitable carriage, said j support being, providedwith; a transverse slot, a, body, member hinged to suchsupport, suchhinge. cionrpris ns; a l Pt'OjQQE Jgh EOL gh the odyber and suchtransverse slot, agrotating'cut: ter; carried by the bodyv member a,train of gears carried i by the body member and arr nged, t d y llgi;the u te nd m a for gu1d ng; -sa 1d body, member and cutter?downwardly-with relation-to said support.

3, Incoinbination, atool for,-cutting key seats comprising a bodymember, a support-,- a connection for connecting said body memer o a dfuppp t, t msaid b y me r-m ns. f n p ratingi Said cu er and meansadapted to be. placed, 'on the work for guiding said body. member andsaid cutter in. a ow war ir c on; aid connec ion being; constructedandarranged to permit downward movement of thencutter and body member assaid support is moved horizon tally-to moVesaid body ,member and cutterrre po dingly: v a v 4. In combination, a,rota1 y,tool for cutting key 1seats, means for. holding the work straight, means for moving said toolforwardly for: cutting a key seat inthe work, nd mi 1 fo re l ge hecourse-t t sa d tool so asito cut an inclinedgkey seat. H

v 5.. In combination ,a tool for cutting key seats a suppgnt adapted, tobeattached to a; ,carriage, means for connecting saidttool to Saidsuppgrt, said connecting neans-be- 'ing; constructed and. arranged to permit,the

tool to move at an anglewith relation toisaid supportras said tool ismove'd forwardly, means for, v holding I the; work in alinement 'Wi h hee f. m em n of s dt m gaa bushing, adapted to be PlfllGed ,in theiwol'ktto receive sa d toohthe bushingbeing adapted to rest in the workin alinement with the axis of movement of said carriage, the innersurface of said bushing being inclined to guide the tool at an angle asthe tool is moved forwardly therein so that the tool Will cut the keyseat at an angle in the work.

6. In combination, a toolfor cutting key seats, a support adapted to beattached to a carriage, means for connecting said tool to said supportso that as said tool is moved forwardly by said carriage, the tool mayalso move downwardly at an angle with relation to said support, abushing adapted to be placed in the work to receive said tool and topermit said tool to cut a key seat in the work, the inner surface ofsaid bushing being inclined to guide said tool at an angle so that thetool will cut the key seat at an angle in the work, and set screws insaid bushing adapted to engage the work to hold the bushing in the work.

7. A tool for cutting key seats comprising a body member, a rotarytoothed cutter mounted in said body member, a pinion meshing with saidcutter, means for rotating said pinion to rotate said cutter, and meansfor adjusting the centers of said cutter and pinion with relation toeach other to take up wear between the teeth thereof and means formounting and actuating said tool so that said cutter will cut a key seatin the work.

8. A tool for cutting key seats compris ing a body member, cylindricalbushings j ournaled in said body member, a stud journaled eccentricallyin said bushings, a rotary toothed cutter secured on said stud, a pinionmeshing with said cutter, means for rotating said pinion to rotate saidcutter, said bushing being adapted to be turned in said body member toadjust said cutter to take up wear between the teeth thereof and theteeth of said pinion, and set screws in said body member for engagingsaid bushings to lock said cutter in adjusted position and means formounting and actuating said tool so that said cutter will cut a key seatin the work.

In testimony whereof I atfix my signature.

GEORGE S. COATS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Eatenta, Washington, 1). G.

